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拿破崙三角形
Author:
羅驥韡 (Pegasus Roe)
說明影片：
http://youtu.be/q9nxM2MYOVE
GeoGebra
New Resources
球体的体积推导（优化版）
四邉形 (四年級) 教師版
兩位數加法
異分母分數減法
拼砌四邊形
Discover Resources
三圓外切
再作万年历单晨
三角五形
tan(x) = x
函数的单调性和导数的副本
Discover Topics
Standard Deviation
Function Graph
Straight Lines
Similar Triangles
Fractal Geometry